UVR Climatology and in situ UVR Regulation of Phytoplankton Dynamics in California Coastal Waters: Photophysiology, Phytoplankton Community Structure and cDOM Responses to Short-term UVR Exposure in Diverse Phytoplankton Communities and the Red Tide Form

1
Invertebrates
2
Jellies Phylum Cnidaria
3
Round Worms Phylum Nematoda

• Live in sediments or tissues of other organisms
• Over 12,000 described species (may be 500,000)
• Very abundant (hundreds per mL of sediment)
• Hydrostatic skeleton

4
Peanut Worms Phylum Sipuncula

• Unsegmented marine worms
• Borrow in mud, corals or empty shells
• Deposit feeders

5
Peanut Worms Phylum Sipuncula
6
Spoon Worms Phylum Echiura

• Exclusively marine, unsegmented
• Non-retractable probiscis

7
Segmented Worms Phylum Annelida

• Segmented worms
• Gut - coelom
• Hydrostatic skeleton
• Longitudinal and radial muscles
• Efficient locomotion and burrowing
• More than 15,000 species
• Cosmopolitan

8
Segmented Worms Phylum Annelida

1. Class Polychaeta

9
Segmented Worms Phylum Annelida

1. Class Polychaeta

• Diverse lifestyles
• Free-living predators
• Often well-developed eyes and sense organs, jaws

10
Segmented Worms Phylum Annelida

1. Class Polychaeta

• Diverse lifestyles
• Burrowing deposit feeders
• Burrowing suspension feeders

11
Segmented Worms Phylum Annelida

1. Class Polychaeta

• Diverse lifestyles
• Burrowing deposit feeders
• Burrowing suspension feeders

12
Phylum Mollusca
13
Phylum Mollusca

1. Body Structure

14
Phylum Mollusca

• Radula

15
Phylum Mollusca

• Reproduction
• Trocophore Veliger

16
Phylum Mollusca

1. Gastropods

17
Phylum Mollusca

1. Gastropods

Petropods
Nudibranchs with symbiotic algae
18
Phylum Mollusca

1. Bivalves

• Laterally compressed
• Two-valved shell
• No head or radula
• Gills used for suspension feeding (active)
  respiration
• Water enters and leaves through siphons
• Some anchor to substrate with byssal threads